please answer the following question

Let $\ ho_I$ be reflection across the line $y=-3$, $\ ho_m$ be reflection across the line $y=1$ and let $R_(C, \\pi/2)$ be the clockwise rotation around the point $(-1,1)$ by angle $\\pi/2$. Identify the rigid motion $\ ho_m \\circ R_{C,\\pi/2) \\circ \ ho_I$